Method of uniting alpha rubber heel and leather base



Oct. 27, 1925. 1,558,496

D. PARKS METHOD OF UNITING A RUBBER HEEL AND LEATHER BASE Filed Jan. 31.1924 Patented Oct. 27,1925.

UNITED STATES PATENT OFFICE.

DENNIS PARKS, OF ST. LOUIS, MISSOURI.

METHOD OF UNITING A RUBBER HEEL AND LEATHER BASE.

Application filed January 31, 1924. Serial No. 689,789.

To all whom it may concern:

'Be it known that I, DENNIS PARKS, a citizen of the United States,residing in the city of St. Louis and State of Missouri, have inventednew and useful Improvements in Methods of Uniting a Rubber Heel andLeather Base, of which the following is a specification.

This invention relates to the art of heel building, and moreparticularly to that branch of this industry which consists in securinga rubber heel to a leather base.

In building a composite heel blank consisting of a leather base andrubber tread or heel, I follow the general plan of procedure utilized inso-called log building, in which the heel lifts, either whole or pieced,supplied with paste, are forced downward in a container having, incross-section, the general shape of a heel blank, and which offerssuficient, resistance to require con siderable pressure to force thecolumn downward, so that the lifts are maintained in column formationand under pressure for a sufficient length of time to allow the pasteused in connecting the lifts together to set. The process, as heretoforepracticed by me, differs from that of straight log build ing, in thateach heel blank is built as a unit. As applied to composite heels ofleather and rubber, the rubber heel has been inserted in the containerin a horizontal position, the leather base with paste applied placed ontop of the rubber heel, and then a plunger operated to force the heelblank downward in the container. A standard rubber heel, as nowconstructed, has its breast side in clined rearwardly from the bottom ortread surface to the top. In the use of such rubber heels, it followsthat when the leather base is applied thereto, the breast of the leatherbase will project slightly beyond the upper edge of the rubber heel, dueto the in cline of the breast referred to. This necessitates a breastingoperation to make the breast side of the leather base coincide with thatof the rubber heel. This is an extra operation, and it is desirable toavoid the same if possible in order to reduce the cost of manufacture.

To overcome this objection, I have conceived the ideaof inserting therubber heels in the container in an inclined position, that is, with thebreast side of the rubberheel lower than the back or. rounded side, "soas to bring the breast side of the rubber heel substantially parallelwith the breast wall of the container. This, of course, results inpositioning the upper edge of the breast of the rubber heel nearer tothe breast wall of the container than would be the case when the rubberheel occupies a horizontal position. The leather base is likewiseinserted in a container and positioned on top of the rubber heel in asimilar inclined position, with the result that the lower edge of itsbreast is thrown inward. The degree of inclin'ation is regulated, sothat when, the leather base is placed in position on the rubber heel,the lower edge of the breast of the leather base will be flush with theupper edge of the breast of the rubber heel. In

this way, I obviate the necessity of breast-- ing the leather base tocause it to be flush with the breast of the rubberheel.

While this operation necessarily resides in forcing the rear or roundedside of the leather base beyond the corresponding side of the rubberheel, this is not an objection, as this occurs normally when the rubberheel and leather base are inserted in a horizontal position in thecontainer, and the rounded side or back of the leather base must,therefore, be trimmed off in any event. Thus, no extra operation'isinvolved, and the breasting operation, as stated, is avoided.

The desired incline to the rubber heel and leather base is produced byemploying a plunger having its operativeface, or that com ng in contactwith the upper surface of the leather base, inclined to the required degree, so that when it is lowered to force the heel blank into thecontainer, the initial heel blank will be given the desired inclination,and thereafter, as each rubber heel and leather base is inserted in thecontainer on top of a preceding heel blank, it will rest in thecontainer at such inclined position, and the plunger will then simplyoperate to force the composite heel blank downward in the container. Ofcourse, the pressure of Cir the plunger and the resistance oiiered tothe movement of the heel blanks by the con tainer will insure that eachheel blank will be forced to exactly the same inclination by the inclineof the plungeneven though they only approximated such position wheninserted by hand in the container.

In order that my invention may be clearly understood, I have illustrateddiagrammatically in the accompanyingdrawing the relative positions ofthe leather base and rubber heel at the breast when the same are assembled in horizontal position in the con tainer, andthe.changeellectedin their relative position by causing the parts to be givenfan inclinedposition. w

Figure 1 shows, diagrammatically, the upper portion or a container witha composite heel blank therein in a horizontal position, and showing theelf-set at the breast of the heel blank caused by the projection o1 theleather base beyond the upper edge of the breast of the rubber heel; and

Figure 2 sh'ows, diagrammatically, the same parts as illustrated inFigure l, but with the plunger having an inclined face or bottom, andcomposite heelblanks forced to an inclined position therein by theplunger, with the lower edge of the breast of the l'eather base flushwith the upper edge of the breast of the rubber heel.

In Figure '1, the numeral 1 indicates a container, 2, a rubber heelin'serted therein, and 3, a leather base placed on top of the rubberheel with theinterpo'sition of paste. The numeral 4 indicatesa plungerfor forcing the leather base and rubber heel downward in the container,v c The standard rubber heel employed has its breast 5 inclinedrearwardly, as shown, with the result that the leather base forms anoil-set or projection at the breast of the composite heel blank, asindicated at 6. If assembled in the manner shown in Figure 1, thiscit-set 'must be cut oil by the process of bi-casting before the heelblank can be secured to the shoe.

In Figure 2, the plunger 7 is pro ided with an inclined bottonrS, andwhen the rubber heel and leather base are inserted in the container, andthe plunger lowered, the heel blank will be caused to assume theinclined position shown, bringing the lower edge of the breast of theleather base flush with the upper edge of the breast of the rubber heel,as indicated at 9. Thereafter, as each rubber lieeliand leather base areinserted in the container, they will assume a corresponding inclinedposition and will be forced downward in the container at such incline,by reason of the inclined bottom 8 or the plunger 7, The plunger 8 willbe "adjuste'd'to any desired incline according to the incline of thebreast of the rubber heel employed, and for the sake of illustration Ihave shown a conventional adjustable connection at 10.

I claim:

1. The method or uniting the members of a ccn'iposite heel-blank ofleather and rubbar, in which the breast of the rubber heel inclinesrearrmrdly, which comprises pasting a leather base and a rubber heeltogether within a container, the walls of which are engaged by the edgeso'fsaid members while maintaining the members at such inclination as tobring-the upper edge or the breast or the rubber heel substantiallyflush with the lower edge of the breast of the leather base. v

2. The method or uniting the members of a composite heel-blank ofleather and rubber, in which the breast of the rubber heel inclinesrearwardly, which comprises pasting a leather base and a rubber heeltogether within a container, the walls or which areengaged by the edgesof said members, and exerting pressure on the heelblank whilemaintaining the same at such inclination as to bring the upper edge ofthe breast of the rubber heel substantially flush with the lower edge ofthe breast of the leather base. I

3. The method of uniting the members of a composite heel-blank ofleather and rubber, in which the breast of the rubber heel inclinesrearwar'dly and'the breast of the leather base is perpendicular to thesurface to be pasted, which comprises pasting a leather base and arubber heel together with in a container, the walls of which are engagedby the edges of said members and forcing them downward in a containerwhile maintaining the unitedparts at an inclination sufiicient tosubstantially true the breast or the rubber heel with the wall of thecontainer. v

l. The method of uniting the members of a composite heel-blank leatherand rubber, in which the breast of the rubber heel inclines rearwardlyand the breast of the leather base is perpendicular to the surface to bepasted, which comprises pasting a leather base and a rubber heeeltogether within a container, the walls of which are engaged by the edgesof said ncinbers and forcing them downward in a container by the use ofa pressure member having its operative race inclined to such a degree asto force the heel-blank to a position in which the breast of the rubberheel will be substantially parallel with the wall of the container.

5. The method of forming composite heel-blanks of leather and rubber, inwhich the breast of the rubber heels employed "incline rearwardly andthe breast of the leather base is perpendicular to the surface to bepasted, which comprises pasting a leather base and a rubber heeltogether in blanks, as thus formed, downward in the a container theWalls of which are engaged container by the use of a pressure member 10by the edges of said members While mainhaving its operative faceinclined to the taining the united parts at an inclination degreerequired to true the meeting breast sufficient to bring th u p r dg f thedges of the rubber heel and leather base. breast of the rubber heelsubstantially flush I11 nI) w f I have hereunto With the lower edge ofthe breast of the y handleather base, and successively forcing heel-DENNIS PARKS.

